Across
- 2. the upper layer of the earth's mantle below the lithosphere
- 8. the several large landmasses that make up the world
- 9. form when plate motions generate magma that erupts on the earths surface
- 12. a boundary where two plates move together
- 13. the process by which new oceanic crust forms when magma rises up
- 14. join together into a single large landmass and then started drifting
- 15. a ring of volcanos on the edge of tectonic plates
- 17. the impression of a prehistoric animals in rocks
- 19. a process by which material is added to tectonic plates or landmass
- 20. when two tectonic plates move away from each other and make room in the ocean floor is called
Down
- 1. A rigid layer made up of the uppermost part of the matle crust
- 3. where two tectonic plates are sliding against each other
- 4. a sudden and violent shaking of the ground
- 5. the study of magnetic minerals in rocks
- 6. the lithosphere is divided into
- 7. a long undersea mountain chain that has a steep narrow valley at its center
- 10. crust beneath the ocean
- 11. the single huge super continent that existed many years ago when all earths continents were joined together
- 16. what element makes up most of earth's core
- 18. when one tectonic plate sinks beneath another